Overseaming sewing-machine.



No. 659,482. Patented Oct. 9 |900 H. A. KLEMM.

VEBSEAMING SEWING MACHINE.'

(Application led Mar. 22, 1900.) (N0 Model-J 2 Sheets- Sheet I.

ig/YIIIIIIINWI f fr; y Z. 7

No. 659,492. Patented oet. 9, |906.

- H. A. KLEMM.

DVERSEAMING SEWING MACHINE.g

(Application filed Mar. 22, 1900.)

2 Sheets-Sheet 2.

No Model.)

vUN rre mares HERMANN A. KLEMM,

ATENT OFFICE.

OF NEW YORK, N. Y.

vO`VEFSEAVIIKIG SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 659,482, dated October 9, 1900.

Application filed March 22, 1900, .Serial No. 9,691. (No model.)

To all whom, it may concern:

Be it known that I, HERMANN A. KLEMM, a citizen of the United States of America, and a resident of New York city, county and State of New York, have invented certain new and useful Improvements in Overedge Sewing- Machines, of which the following is a specification.

This invention relates to apparatus for sewing overedge -seams on a horizontal workplate by means of a vertical needle, rotatory hook, and a reciprocating loop-thread carrier; and it consists, essentially, of means whereby the hook after taking the needle-,loop under the work is caused to shift backward from under the work, so as to swing up clear 0f the edge of the work when carrying the thread up to the looper, and to shift forward under the work when returning for another loop, all as hereinafter described, reference being made to the accompanying drawings, in which- Figure vl is a side elevation of my improved machine with the side plate of the caseremoved and with some parts in section. Fig. 2 is a plan view with parts of the top of the case and some of the looper mechanism removed and with the connecting-rod for working the needle-operating lever in section. Fig. 3 is a detail of the hook-operating parts in side elevation on a larger scale for greater clearness. Fig. 4 is a detail of the looper mechanism in plan view and on an enlarged scale. Fig. 5 is a plan view of the workplate. Fig. 6 is an edge view of the workplate and a loop-controlling attachment for the needle-thread. Figs. 7 and 8 are details of the loop-controller for the needle-thread on an enlarged scale. Fig. 9 is a plan View of the presser-foot. Fig. lO is a detail of the looping-hook and its adjuncts as'seen looking from the left-hand side of Fig. 3. y

The general construction of the machine is about the same as usual in machines having a horizontal work-plate d, upright' needle-bar b, presser-baro, needle-bar-operating lever d, main driving-shaft e, connecting-rod f, and driving-pulley g, said shaft being in a vertical plane including the needle-bar and the parts being inclosed in a case comprising a base part h, and a part t' in the needle-bar and presser-bar-supporting arm j.

7c represents the needle, and Z the presserfoot working in conjunction with the workplate, as usual, said plate being perforated for the needle.

m represents the hook for engaging the needle-thread loop 'n under the Work-plate and carrying it up past the edge of the work to be engaged by the looper o when carrying its thread forward to the needle over the work. The hook is carried on the extremity of the rotatory oscillating shaft p, mounted in the tubular support q, arranged in the vertical plane of the main shaft and needle and carried on the standard s, pivoted at r, so as to swing toward and fromthe needle. The rear extremity of the support q hasa pendent arm t, coupled by a ball-joint u, with the rod o of an eccentric fw, carried on the forward extremity of the main shaft c, which imparts the swinging motion to the hook. The shaft p of the hook has a'toothed pinion 0o, which gears with a toothed segment y, carried on an arm e, pivoted in a hub 2 of the rocking support s and coupled by the arm 5 and rod 3 with an eccentric 4 on the shaft 5 back of and parallel with the main shaft and geared arm 5 are coupled by a ball-joint 7, affording 'freedom for the rocking motion of `the hookcarrying support, by which the hook is caused to swing under and from Linder the work, and the toothed segment for1 oscillating the hookshaft being carried onr the same rocking support imparts' at the same time the oscillating movements of the hook.. The parts areso timed that the hookv swings forward under the work when the point is turned down to engage the thread-loop, and it 'swings back.

ward from under the work prior toA the rise of the point of the hook far enough to interfere with the work. lThe hook has a shoulder 8 at the base of its point 9 to limit the reach of the point through the loop which it takes from the needle, and the support q carries a spreader 44, having a point 45,k onto which the hook carries the needle-loop, so that one member of the loop lodges againsta shoulder 46 at the base of the point to spread the loop and insure certain entry of looper o thereto.

` To provide ample development of the nee- 'with it by the spur-wheels 6.y The rod 3 and v IOO dle-thread loop n on the side of `the needle from which it is to oe taken by the hook, a vertical guard 41 is provided on the other side of the needle to prevent the thread from looping that way, and thus insuring its engagement by the hook. This guard is grooved on its side next 'to the needle, as shown at 42, and is placed in such close proximity to the needle that the needle works in the groove, and thus more elfectively develops the loop. The guard is attached to the under side of the work-plate a by a bracket 43, but may be attached in any approved way; but said guard is not claimed herein.

The looper o is mounted in the end of the reciprocating bar 10, supported in bearings 1l and coupled with the long arm of a lever 12, pivoted at 13 and having a stud '14 working in the groove 15 of a cam 16 on the shaft 5. By introducing the lever 12 between the looper-bar and the cam and by connecting the long arm of the lever to the bar and attaching the stud to the short arm a cam of much shorter throw can be utilized than in an arrangement by which a stud attached to the looper-bar works in the groove of the cam,

Awhich makes an easier motion and is less wearing on the cam.

The hook-support q is inclined downward from the front backward and is grooved at 43 along the upper front part for clearance of thelooper-bar and its adjuncts; but so far as its function is concerned it may range in a level plane if the looper-bar be arranged to permit it, as said bar may obviously be so arranged.

`The take-up for the needle-thread consists of the lever 17, pivoted at 18 in the chamber of the supportingarm j, with its long arm reaching through the head 19 and having a plunger 2O suspended from it within a yoke 2l, attached to the head and perforated at 22 for the thread, which also passes through the plunger, which is similarly perforated, so that when the plunger rises it draws the thread.`

up in a loop, and thus takes up its slack and completes the stitch. The other arm of the take-up lever has a slot 23, in which a stud 24 of a rocking'disk 25 Works, which is mounted on `the pivot 26 and has a slot 27, in which a stud-pin 28 of the needle-bar-operating lever d works to operate the rocker. 'lhe shape of the cam-slot determines the action of the plunger. "supported in an arm. of the bracket 29, sup- The pivot-stud 26 of the rocker is porting thef` lever-pivot 8, said arm having its extremitysecured at 30 to a lug of the lower "Iiange of the caseof the needle-bar-support- Vand the Work-plate forward of the needle in the feedline Ato `a suitable extent for the thread-loops to be formed and drawn on in taking up the slack of the stitches, so as to avoid drawing too much on the work. After being thus drawn np on the fingers the stitches pass oif the tongues as the work feeds along.

The stitches are formed in practically the saine manner as in other machines having a hook taking the needle-thread loop up over the edge of the work lying on a horizontal work-plate and holding them for the looper carrying a thread through the needle-loops to the needle andneed not be more particularly described.

The hook-support may obviously be arranged to slide toward and from the needle with like results.

The feed-bar 49 is coupled at one e nd to rest on an eccentric on shaft 5 at 50 for being raised to grip the work and is pivoted at the other end to the upper end of a vibrating standard 51, to `which the end of aconnectingrod 52 is connected for imparting the reciprocating movements of the feed-bar, said conmeeting-rod being operated by an eccentric at 52 on shaft 5. The feed-bar is free to reciprocate on its lifting-eccentric; but this is the` said needle, a rotatory oscillatingand reciprocating hook, a support for `said hook, and means for operating saidsupport adapted for shifting the hook forward and backward under 'the won-lgs reciprocating looper, a support for said looper, and looper-operating p mechanism, said'support and operating mechanism both independent of the `hooksupport` ing and operating mechanism.

2. Thecombinationwith the vertically-operating needle and horizontal work-plate, of

the rotatory oscillating hook and reciprocating looper, la support for the hook having `rocking motion adapted to shift the hook to-` ward and` from the needleunderthe work, meant;l for so operating said support, `and means for imparting the `oscillating.' motion of the hook on such rocking support.

3. The combination with the vertically-operating needlean'd horizontal work-plate, of

IOO

the rotatory oscillating hook and reciprocating looper, a rocking -support for the hook adapted to shift the hook toward and from the needle under the Work, the main shaft and eccentric thereon connected With said support for so operating it, and means for imparting the oscillating motion of the hook on such rocking support, also means for operating thelooper.

4. The combination with the vertically-operating needle and horizontal Work-plate, of the rotatory oscillating and reciprocating hook adapted to shift foi-Ward under the work to engage the needle-thread and backward from under the Work to clear the edge of the Work in carrying the needle-loop up to the looper, means for operating said hook and means for operating the looper, said means consisting of the lever connected with the looper-bar, and the cani on the counter-shaft connected With the lever.

5. The combination With the vertically-operating needle and its operating mechanism,

the rotatory and reciprocating looping-hook, 

